how to fix P0301 misfire code in Tesla Model S Plaid/Refresh (2021-present)

Learn how to diagnose and fix P0301 cylinder 1 misfire in Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the vehicle's battery to ensure safety.
• Allow the engine to cool down before beginning work.

2. Remove Ignition Coil and Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Steps:
  1. Remove any engine covers obstructing access to cylinder 1.
  2. Disconnect the electrical connector from the ignition coil.
  3. Unbolt the ignition coil from its mounting location.
  4. Remove the spark plug using the spark plug socket.
  5. Inspect both the ignition coil and spark plug for signs of wear or damage.

3. Inspect and Replace Components

• Tools Required: Compression tester, fuel injector cleaning kit (if necessary).
• Steps:
  1. If the spark plug is fouled or worn, replace it with a new one, ensuring it meets manufacturer specifications.
  2. Check the condition of the ignition coil; replace it if damaged.
  3. If the fuel injector is suspected to be clogged, clean it or replace it with a new one.
  4. Perform a compression test on cylinder 1. If compression is low, further engine diagnostics may be required.

4. Reassemble and Connect

• Tools Required: Torque wrench.
• Steps:
  1. Reinstall the spark plug into cylinder 1 and torque it to the manufacturer's specifications.
  2. Reinstall the ignition coil and ensure it is securely mounted.
  3. Reconnect the electrical connector to the ignition coil.
  4. Replace any engine covers that were removed.